I disagree. The first revolution was a success, was it not? That is the one that out in the Provisional government and ultimately the Emperor's abdication. Unfortunately, they were no more compent than the Imperial governmet That in itself guaranteed another revolution.
By luck, cunning, impeccable planing, intimidation and terror, the Bolsheviks came out on top. The revolution was inevitable, but the winner was not a sure thing, I feel.
I think you give too much credit to the Church. By it link and support of Imperial rule, it was equally discredited,. There was not much love lost between the people and the Church. They were seen as equal oppressors. That perception may have been different out in the country side, but it reached them eventually.
Of course, this is all how I see it.